title: Femtosecond laser-induced periodic structure adjustments based on electron dynamics control: from subwavelength ripples to double-grating structures.
abstract: This study proposes a method for adjusting subwavelength ripple periods and the corresponding double-grating structures formed on fused silica by designing femtosecond laser pulse trains based on localized transient electron density control. Four near-constant period ranges of 190-490 nm of ripples perpendicular to the polarization are obtained by designing pulse trains to excite and modulate the surface plasmon waves. In the period range of 350-490 nm, the double-grating structure is fabricated in one step, which is probably attributable to the grating-assisted enhanced energy deposition and subsequent thermal effects.
authors.forename: Xuesong
authors.initials: X
authors.lastname: Shi
authors.forename: Lan
authors.initials: L
authors.lastname: Jiang
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Sumei
authors.initials: S
authors.lastname: Wang
authors.forename: Yanping
authors.initials: Y
authors.lastname: Yuan
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Lu